Vial support assembly for a level



FIG. 1 is a front, bottom perspective view of our new, original and ornamental design for a vial support assembly, with the broken lines showing a level for illustrative purposes;

FIG. 2 is a front elevational view thereof; and,

FIG. 3 is a rear elevational view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for a vial support assembly for a level, as shown and described. 